Anyways shop says it's the HPOP. I'm not sure but seems to me when they spent 10 hours last time they could have checked the HPOP while they were replacing the STC fitting. Woud have saved me 8 hours of labor.

If it's an '04 or later, pull the ICP sensor out from the P/S valve cover using a 15/16" wrench, and insert a hose with the same thread/pitch as the ICP with (preferably) a gas well testing gauge (2000PSI minimum) and crank.

You seem to already understand that the 6.0 requires a minimum of ~350psi to start, and with this easy and cheap setup, you can determine this for yourself while someone else cranks it over for you.

Please report back with results and we can go from there. I'm leaning towards your IPR being shot at this point.

Thanks for the feedback. Unfortunately I had to leave it at a shop. They pressure tested and unlike two weeks ago this time it held pressure. They already replaced orings etc under the valve covers and the STC fitting.

They now pulled the HPOP and said they could hand test it by rotating and counting the stop points. This one spun freely.

Anyways they quoted me $988 for a new one here in Canada so I hopped Stateside and picked one up at Ford for $583.

I sure hope this solves it as it's getting pricy and I have a 2300 mile tow planned for next week.

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